 # physics Chapter 003.pdf - UNIT 3: DYNAMICS 1. Define...

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OXFORD ISLAMIC SCIENTIFIC SCHOOL |IX PHYSICS11.Define Dynamics.Dynamics is the study of cause of motion. In common, force is a cause of motion.Several other factors like mass of the object and frictional force also affect themotion of an object. These factors are also studied under dynamics.2.Define Force.Force is the agent that changes the state of rest or uniform motion of a body.Its SI unit is Newton (N) and it is a vector quantity.Force is required to change the position, state or shape of an object.Force can act as pull or push agent.Force produces acceleration. It can producedistortion.3.Define One Newton.One Newton (1 N) is the amount of force that can produce 1 ms-2acceleration in 1kg mass.4.Define Momentum.Momentum is defined as quantity of motion contained in a body.The momentumof an object is equal to the mass multiplied by the velocity of the object.Momentum = mass x velocitySymbolically, the momentum is represented byp.Thus, the above equation can be written asp = mvwhere m is the mass and v is the velocity. The momentum is vector quantityUNIT 3: DYNAMICS
2IX PHYSICS| OXFORD ISLAMIC SCIENTIFIC SCHOOL5.What is the SI unit of Momentum?6.DeriveΔp = Ft
7.How force of momentum works in different safety devices. Give anexample.
OXFORD ISLAMIC SCIENTIFIC SCHOOL |IX PHYSICS3

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